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Matter and Atoms

Properties of Matter and Structure of the Atom

model a visual, verbal, or mathematical explanation of data collected from experiments
technology the practical use of scientific information
weight the effect of Earth's gravitational pull on matter
applied research a type of scientific investigation that is undertaken to solve a specific problem
accuracy refers to how close a measured value is to an accepted value
precision refers to how close a series of measurements are to one another
percent error the ratio of an error to an accepted value
density mass per unit volume
derived unit a unit defined by a combination of base units
isotope atoms of the same element with the same number of protons but different numbers of neutrons
cathode ray a ray of radiation that originates from the cathode and travels to the anode of a cathode ray rube
mass number the number after an element's name, representing the sum of its protons and neutrons
heterogeneous mixture one that does not have a uniform composition
homogeneous mixture one that has a uniform composition; is also called a solution
Created by: wigginsg